Governor



(No Model.) v 4./Sheets-Sheet 1,

G. J. ALTHAM.

GOVERNOR.

No. 546,872. Patented Sept. 24, 1895.

(No Model.) I 4 Sheets-Sheet 3. G. J. ALTI-IAM.

GOVERNOR. No. 546,872. t Patented Sept. 24, 1895.

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(No Model.) 4 sheets-sheet 4 G. J. ALTHAM.

GOVERNOR.

No. 546,872. Patented Sept. 24, 1895,

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GEORGE J. ALTHAM, OF SVANSEA, MASSACHUSETTS.

GOVERNOR.

SPECIFICATION forming part of Letters Patent No. 546,872, datedSeptember 24, 1895. Application filed December 17, 1894:. Serial No.532,022. (No model.)

To all whom it may concern) Be it known that I, GEORGE J. AL'rHAM,'ofSwansea, in the county of Bristol and State of Massachusetts, haveinvented certain new and useful Improvements in Governors, of which thefollowing is a specication.

This invention relates to governors for regulating the speed of motors,and particularly that class of motors in which a turbine wheel is drivenby fluid which enters a plurality of ports, a valve or valves beingarranged to move over said ports, so thatany number of them can beopened.y

The presentinvention employs liuid under pressure as a speed-governingagent, and the invention aims to provide a quickly-acting governor,which keeps the motor at a practically uniform speed.

The accompanying drawings illustrate an embodiment of the invention.

Figure l shows the motor and governor in top plan. Fig. 2 shows asectionalized side Fig. 3 shows a crosssection taken substantially onthe line 3 3 of Fig. 2. Fig. et shows a sectionalized end elevation.Fig. 5 shows a section on line 5 5 of Fig. 4. Fig. 6 shows a section online 6 6 of Fig. 4. Fig. 7 shows a sectional detail of certain valvemechanism. Fig. 8 shows a sectionalized side elevation, on an enlargedscale, of parts appearing at the right-hand side of Fig. 2. Fig. 9 showsa section of line 9 9 of Fig. S. Fig. 10 shows a detail ot' a certainfan.

The letter a designates the supportingbase of the machine, and astandards thereon, formed to contain roller-bearings a2, which support ashaft b, carrying a pulley b. The shaft h is the main shaft of themotor, and on :it is affixed a turbine wheel h2, which is recessed inone side to receive an annulus c, having passages c registering withthose in the wheel. The said annulus is fixed, and within it is arrangedan oscillatory valve composed of curved feet d, conforming to theinterior surface of the annulus, and a connecting-yoke d', fastened to astem d2.

The turbine wheel and the annulus are inclosed in a casing e,the annulusbeing fastened to one side of said casing, and a steamchest e isarranged on one side of said casing and communicates with the spaceinclosed by the annulus. The valve-stem cl2 is journaled in a bearingd3, fastened to the steam-chest, and said stem protrudes from the latterand has affixed to it a segment d4. meshes into this segment, said rackbeing formed on the rear side of a head d6, which is fastened on theupper end of a rod d?, carrying at its lower end a piston d8 in acylinder dg, erected on the base a. The said cylinder has ports fand fat opposite ends, (see Fig. 8,) and these ports register with ports f2and f3 in a steam-chest g, arranged at the side of the cylinder. In theback of the steam-chest there are formed exhaust-ports g and g2 and asteam-inlet port g3. The chest has a circular bore, which receives atube h, having ports h h2 h3 h4 h5 to communicate, respectively, withportsf2, f3, g', g2, and g3. Said tube constitutes a seat for apiston-valve t', of double form, which valve controls inlet of steam tothe cylinder. Under the adjustment shown in Fig. 8 it will be seen thatthevalve closes communication between the steam-supply port g3 and thecylinder on the upper side of the piston and opens communication betweensaid port and the cylinder on the lower side of the piston. The portsff3 h2 h4 now supply a passage for the exhaust-steam. By an upwardmovement of the valve the order is reversed.

The tube h is movable and connects at its upper end through a link h5with one arm h6 of a bell-crank lever, which is pivoted to a lug on thesteam-chest e', and whose other arm hl' carries a roller-equipped pinhs, occupying an oblique slot h, formed in the front side of the headd6. Thus when the piston moves the tube h is moved for a purposehereinafter explained.

The piston-valve t' is on a rod t', which is jointed to a lever t2,pivoted at one end to the casing e and connected at the other endthrough a link t3 with the stem j of an inverted air-receiver j. Thelatter is of cylindrical form, and its pendent portion occupies anannular liquid-containing space formed between an inclosing casing L7'2and an upstanding shell ,7'3 within the same. A rodj4 extends downwardwithin the receiver j as a continuation of the stem j, and weights]5 areplaced on said rod.

A passage-way 7c, bored in the base, commu- A rack d5 ICO nicates withthe space inclosed by the shell jg, anda conduit k extends between saidpassage-way and a casing 7a2, supported by one ofthe standards ct.lVithin said casing there is a fan m, which is affixed to the main shaftb and which draws air through orifices m in the casing and discharges itinto the conduit 7a.

The operation is as follows, considering that the passages c are allopen, as shown in Fig. 3: The revolution of the shaft l) causes the fanm to drive air into the receiver j', and when the speed becomesexcessive the receiver will be raised, this being governed by the amountof weight carried by said receiver. The elevation ofthe receiverproducesmotion in the lever i2, which in turn moves the valve t' in the tube 7L,and when the upper piston of said valve crosses the port h2 steam isadmitted through that port to the upperside of the piston d3 and thelatter is depressed, the steam on its under side exhausting through theports 7L', h, and g. rlhe downward movement of the piston producesmotion of the valve-stem (Z2 through the rack d5 and segment d4, and theturning of said stem carries the feet d over the passages c', wherebythe inflow of the motive fluid is restricted and the speed ofthe motorcorrespondingly decreased. The downward movement ofthe piston also movesthe tubular valve-seat h upward by reason of the coaction of the slot hiwith the bell-crank lever hhl. Thus, after the valve has shifted, thevalve-seat follows it and keeps the ports of the valve-seat in proximityto the valve, so that a very slight movement of the latter at any timewillreverse the steam action in the cylinder di.

It will be seen that the invention provides a quickly-acting governor,which will hold the motor at a practically-uniform speed.

lVhatl claim as my invention is as follows:

l. The combination with a fluid motor and its controlling valve, of agoverning apparatus comprising a steam cylinder and piston,

` suitable connections between said piston and the said motor-valve, avalve controlling admission of steam to said cylinder, a movablevalve-seat interposed between said steamvalve and the ported side of thecylinder and itself suitably ported, connections between the piston andthe valve-seat whereby the latter is moved by the piston, a movableair-receiver suitably jacketed, connections between said receiver andthe steam-valve, and airforcing means driven by the motor and incommunication with the air-receiver.

2. The combination with a fluid motor having an oscillatory controllingvalve with a segment on its stein, of a governing apparatus comprisingasteam cylinder', a piston therein whose rod carries a head with a rackon one side in mesh with the segment on the stem of the oscillatoryvalve, and with an oblique slot in the other side, a valve controllinginlet of steam to the said cylinder, a movable valveseat interposedbetweensaid valve and the ported side of the cylinder', a lever engagedat one end with the oblique slot in the head of the piston-rod, andconnected at the other end with the said movable valveseat,a movableair-receiver, suitable connections between the same and the steam-valve,and airforcing means driven by the motor and communicating with the saidair-receiver.

In testimony whereof I have signed my name to this specification, in thepresence of two subscribing witnesses, this 15th day of December, A. D.180i.

GEORGE J. AL'IIIAM. lVitnesses:

C. F. BROWN, A. D. IAnmsoN.

